Junipero Serra Boulevard - Route Description

Route Description

Junipero Serra Boulevard begins at exit 44 (Avalon Drive) of I-280, and travels north along the east side of I-280 as a four-lane divided highway with minimal intersections, just east of the ridge line of the San Francisco Peninsula that Skyline Boulevard (SR 35) travels along. The median ends when it crosses Hickey Boulevard; the portion of Hickey Boulevard east from Junipero Serra Boulevard to El Camino Real (SR 82) was built as part of that portion of Junipero Serra Boulevard to the north. The boulevard continues northwards with occasional intersections, some with access to I-280, before crossing to the west side of I-280 just north of Washington Street in Daly City and back to the east side north of School Street. At John Daly Boulevard, Junipero Serra Boulevard crosses I-280 for the final time and becomes part of SR 1; the northbound lanes simply cross over I-280, merging with the ramp that carries SR 1 from I-280 onto the boulevard, but southbound traffic must pass under Daly Boulevard, exit and loop over the bridge it just passed under, and then turn right onto Junipero Serra Boulevard.

Just beyond Daly Boulevard, Junipero Serra Boulevard enters San Francisco as a six-lane highway, expanding to eight lanes after the interchanges with Alemany Boulevard and Brotherhood Way. SR 1 soon turns off to the northwest onto 19th Avenue, with three lanes making the turn in each direction and six (three in each direction) remaining on the boulevard. The final section of Junipero Serra Boulevard has frontage roads for local access, and is planted with trees between the main and frontage roadways. At Ocean Avenue, the K Ingleside line of the San Francisco Municipal Railway enters the median, remaining there until the boulevard ends several blocks later at St. Francis Circle. At this five-way intersection, Sloat Boulevard heads west, St. Francis Boulevard east, Portola Drive northeast, and West Portal Avenue north-northeast, taking the rail line to the Twin Peaks Tunnel.